Figure 1 . — For almost a century tobacco has been the principal cash crop of Connec- 

 ticut Valley farmers. The crop is at its best on the well-drained alluvial soils as shown 

 here, and under a continuous cropping system. 



Figure 2. — Commercial fertilizer supplemented with manure has produced the best 

 quality of tobacco, and the yield has been second best. 



Left foreground: Tobacco grown continuously with fertilizer and manure, but no 

 cover crop. 



Right background : Timothy lor clover hay) and corn; part of the animal-husbandry 

 rotation. This combination produced tobacco of poor quality an<l low yield. 



